More lines in one chart

Hello!

English is not my native language, but I figured there wouldn't be too many hungarians reading this forum, so I'll try to do my best to explain my problem.

So, I have to put three lines in one chart. I've done two, but one of the X values of the third line is different from the other lines' third X value, and I can't make the program understand this difference. If I try to correct it, all the X values turn into the X-es of the first and second or into the X-es of the third line.

I've loaded the chart up here, maybe it explains the problem better than me.

Thanks for the help!

Edit: URL fixed

You need to use a XY-Scatter chart rather than a Line chart in order to define each series with it's own x and y values.

See attached.